Similar to http://support.microsoft.com/?kbid=324402 the issue may require you to uninstall McAfee, perform some online virus scans as well as eject any Spyware you find (Spybot, Adaware).
Then reinstall your Antivirus.
I'm having problems with my Dell Desktop computer, and was hoping that someone here could help me out.
I am running Windows XP/McAfee Version 8.0. I also use ad-aware SE personal, and Sypware doctor (It is the free version and I am unable to receive updates). And my husband recenly installed Fix it Utilities 5.0.
In the last week or so my computer has slowed down to almost NOTHING! If I click on start it sometimes takes nearly 5 minutes for the start menu to pop up --after I've been online for a few minutes my pages quit loading. The weird thing is that sometimes (like this morning) it does better.
Since I've been having all of this trouble I've been getting the message "NT on-access scanner has encountered a problem and needs to close."
I don't know if it is a coincidence, but I started noticing the problem after my husband installed Fix-it utilities 5.0. He ran some of the "fix-its" without creating a restore point and I'm afraid that it may have removed something vital to the systems operations.
Also...I've ran McAfee virus scan, and the utilities virus scan and they were both clean. I've also ran spyware doctor and ad-aware, and nothing has helped!
If you need any more information...please ask!